rickets is a nutritional disorder that can develop if you do not get enough vitamin d calcium or phosphate rickets leads to poor functioning of a bone s growth plate growing edge softened and weakened bones stunted growth and in severe cases skeletal deformities
Hence, a 20-year period of the patent usually gives manufacturers a chance to recoup the cost of developing a new drug. When a drug patent expires, any pharmaceutical company can manufacture and sell the drug. A drug, which is produced and distributed without patent protection is called a generic drug.
Where it exists, the term of protection for a design patent may differ from that of a utility patent. In the US. the term for a utility patent is 20 years from the earliest US filing date relied upon by the applicant, while the. term for a design patent is 14 years from the date of the patent grant.